#include <bits/stdc++.h>
using namespace std;

int main() {
    int t;
    cin >> t;

    while (t--) {
        int n;
        cin >> n;

        vector<int> cnt(33);

        for  (int i = 0; i < n; i++) {
            unsigned long long x;
            cin >> x;
            
            int len = 64 - __builtin_clzll(x);
            cnt[len]++;
        }

        cout << *max_element(cnt.begin(), cnt.end()) << '\n';
    }
}